ST. FRANCIS, Wis. (CBS 58) -- A crash in St. Francis resulted in one death early Friday, May 3.

Authorities report that an SUV and a small transit bus collided near Howard and Pennsylvania at around 8:25 a.m.

The crash reportedly involved a 43-year-old Milwaukee man driving an SUV eastbound in the westbound lanes, leading to a collision with a transit bus that was heading westbound in the same lanes.

Officials say the SUV struck a small tree after the collision and came to a stop.

Investigation details reveal that the SUV driver might have suffered a medical emergency, contributing to the accident. He was transported to a local hospital but was later pronounced dead.

The bus driver, a 56-year-old man from West Allis, is said to have been unharmed, and there were no passengers on the bus at the time.

Officials are not yet identifying the deceased, pending family notification. The crash remains an ongoing investigation.